Outboard motor mount attachment for inboard-outboard motors



April 14, 1970 H. DALKE 3,505,971

OUTBOARD MOTOR MOUNT ATTACHMENT FOR INBOARD-OUTBOARD MOTORS Filed Aug. 5, 1968 Herberi" Dalke I L. BY JNVENTOR /4 @MQQM Ageni" United States Patent 3,505,971 OUTBOARD MOTOR MOUNT ATTACHMENT FOR INBOARD-OUTBOARD MOTORS Herbert Dalke, 422 College Drive, Salem, Oreg. 97304 Filed Aug. 5, 1968, Ser. No. 750,107 Int. Cl. B63h 1/14, 5/06 US. Cl. 115-34 5 'Claims ABSTRACT OF THE DISCLOSURE A framework supports at its front end an apertured bracket by which the framework is attached releasably to the hoisting eyelet projecting from the top of an inboardoutboard motor. The framework also supports at its bottom end a pair of laterally-spaced anchor hooks arranged to engage under laterally projecting shock absorber pivot pins on the motor. The framework also supports at its rear end a mounting pad for releasably supporting an outboard motor in pickaback relation to the inboard-outboard motor.

BACKGROUND OF THE INVENTION This invention relates to motors for boats, and more particularly to an attachment for mounting an outboard motor removably on an inboard-outboard motor, in pickaback relation.

It is generally recognized that conventional inboard-outboard motors cannot be reduced to a speed sufficiently slow to utilize a boat properly for trolling. Efforts to reduce the speed of such boats primarily have involved the attachment of bafile plates to the boat to create drag. Others have resorted to the dragging of buckets behind the boat to create sufiicient drag. The attachment of baffles of sufficient size presents problems of maneuverability in shallow water and also of mounting and dismounting the boat on and from a trailer. Both approaches also are wasteful of power and, therefore, expensive to use.

SUMMARY OF THE INVENTION In its basic concept the present invention provides an attachment by which a small horsepower outboard motor may be mounted detachably on an inboard-outboard motor, in pickaback relation, to provide trolling speed for a boat.

It is by virtue of the foregoing basic concept that the primary objective of the present invention is achieved, mainly to overcome the disadvantages of the prior art, as enumerated hereinbefore.

Another important object of this invention is the provision of an outboard motor mount attachment for inboard-outboard motors, which attachment is of simplified construction for economical manufacture and is capable of attachment and detachment to and from an inboardoutboard motor with speed and facility.

The foregoing and other objects and advantages of the present invention will appear from the following detailed description, taken in connection with the accompanying drawing of the preferred embodiment.

BRIEF DESCRIPTION OF THE DRAWING FIG. 1 is a view in side elevation of an outboard motor mount attachment for inboard-outboard motors, embodying the features of the present invention, an inboardoutboard motor and an outboard motor being shown in broken lines to illustrate their relationship to the attachment.

FIG. 2 is a front elevation of the attachment as viewed from the right in FIG. 1.

3,505,971 Patented Apr. 14, 1970 Ice DESCRIPTION OF THE PREFERRED EMBODIMENT In FIG. 1 there is illustrated in broken lines a conventional inboard-outboard motor 10 adapted to be mounted at the stern of a boat. The motor includes a steering rudder 12 and driving propeller 14. The motor is provided with a pair of laterally spaced shock absorbers 16, the rear ends of which are mounted on pivot pins 18 which project laterally outward from opposite sides of the motor. The motor also is provided at its upper end with an eyelet 20 adapted to be engaged by the hook of a hoisting cable, to facilitate removal of the motor from the boat, for maintenance and repair.

Also illustrated in broken lines in FIG. 1 is a conventional outboard motor 22 which includes a steering rudder 24 and driving propeller 26. As is well known, such motors are provided with a clamp 28 by which to secure it to a boat, and with a steering handle 30 by which to pivot the motor for steering the boat. Also, as is well known, such motors include storage for a supply of motor fuel.

In accordance with the present invention, means is provided for mounting an outboard motor detachably on an inboard-outboard motor, in pickaback relation. In the embodiment illustrated, said means includes a framework comprised of the front side member 32, bottom side member 34, rear side member 36 and top side member 38. The front and bottom side members are formed from a single length of structural material, such as steel, bent arcuately intermediate its ends to conform to the adjacent rear surfaces of the inboard-outboard motor. The rear side member is formed of a plate of structural material, such as steel, and its lower end is secured, as by welding, to the bottom side member. The upper ends of the front and rear side members are joined together by the top member which, in the embodiment illustrated, comprises a pair of straps of structural material, such as steel. These straps are secured, as by welding, at one of their ends to the front side member and at the other of their ends to the opposite sides of the rear side member.

Means is provided for attaching the front side 32 of the framework releasably to the inboard-outboard m0- tor. In the embodiment illustrated, and by virtue of the provision of the hoisting eyelet 20 on the motor, said attaching means comprises a pair of laterally-spaced brackets 40 which are secured, as by welding, to the front side member of the framework and project forwardly therefrom. The pair of brackets are adapted to receive the eyelet 20 between them and are provided with axially aligned openings adapted to register with the eyelet opening. An attaching pin 42 extends freely through the aligned openings in the brackets and is adapted also to extend through the eyelet opening. In the embodiment illustrated the attaching pin has an enlarged head 44 at one end and a transverse opening 46 adjacent the opposite end for the reception of a cotter pin, by which to secure the latter against accidental withdrawal from the openings in the bracket. Other forms of attaching pins, such as a conventional bolt, may be employed, as desired.

Means also is provided for anchoring the bottom side of the framework against rearward displacement relative to the inboard-outboard motor. In the embodiment illustrated, and in view of the provision of the laterally projecting shock absorber pivot pins 18 on the motor, said anchor means comprises a pair of laterally-spaced hooks 48. These hooks are secured to the bottom side member 34 and project downwardly therefrom. The lower ends of the hooks are bent angularly rearward, so that they engage under the shock absorber pivot pins, abutting the forward sides of the latter.

If desired, as is preferred, a protective strip 50 of felt, rubber, or other suitable and preferably resilient material may be glued or otherwise bonded to the outer surfaces of the front and bottom side members of the framework, for interposition between the latter and the adjacent surfaces of the inboard-outboard motor, to protect the latter against scratching or other damage.

To assist the hooks in preventing lateral displacement of the framework relative to the inboard-outboard motor, there preferably is provided a pair of laterally-spaced stabilizer tabs 52. The tabs are secured, as by welding, to the bottom side member and project downwardly therefrom, forwardly of the hooks 48. The tabs are spaced apart a distance substantially equal to the width of the inboard-outboard motor housing confined between them. Accordingly, lateral stresses are absorbed primarily by the tabs.

The rear side member 36 of the framework supports an outboard motor mounting pad 5 4. The pad may comprise a single block of wood, a lamination of a plurality of sheets'of polywood, or any other suitable structural material. It is secured to the rear side member, between the top straps 38, by such means as the bolts 56. The pad is dimensioned appropriately to receive the conventional clamp portion 28 of the outboard motor 22.

It is to be noted that the space between the laterally spaced pair of top side straps 38 accommodates pivotal movement of the outboard motor 22 between operative and inoperative positions. It also is to be noted that the mounting attachment supports the outboard motor with its rudder and propeller assembly disposed upwardly and rearwardly of the propeller of the inboard-outboard motor. It is by this arrangement that the outboard motor may be left in the downwardly depending, operative position illustrated in FIG. 1 without interfering with operation of the inboard-outboard motor, since the wake provided by the propeller of the inboard-outboard motor forms a trough in the area of the rudder and propeller assembly of the outboard motor. However, when the propeller of the inboard-outboard motor is inoperative, the stern of the boat settles deeper into the water, thereby immersing the rudder and propeller assembly of the outboard motor in it.

The outboard motor mount attachment described is installed on the inboard-outboard motor in the following manner:

The framework is tilted slightly rearward so that the hooks 48 may be brought under the shock absorber pivot pins 18. The framework then is tilted forwardly, bringing the hoisting eyelet between the laterally spaced brackets 40. The securing pin 42 then is passed through the registering openings in the brackets and eyelet, whereupon the attachment is secured firmly to the inboard-outboard motor.

Removal of the attachment from the in-board-outboard motor is achieved by reversing the foregoing procedure, as will be apparent.

Having now described my invention and the manner in which it may be used, I claim:

1. An outboard motor mount attachment for an inboard-outboard motor, comprising (a) a framework having front, rear and bottom sides,

(b) bracket means projecting forwardly from the front side of the framework for releasable attachment to an inboard-outboard motor,

(c) anchor means projecting downward from the bottom side of the framework for releasable engagement with the inboard-outboard motor,

((1) an outboard motor mounting member on the rear side of the framework, and

(e) laterally spaced stabilizer means projecting downward from the bottom side of the framework forward of the anchor means for releasable engagement with opposite sides of the inboard-outboard motor 2. A11 outboard motor mount attachment for an inboard-outboard motor, comprising (a) a framework having front, rear and bottom sides, the front and bottom sides of the framework being contoured substantially to match the adjacent surfaces of the inboard-outboard motor,

(b) bracket means projecting forwardly from the front side of the framework for releasable attachment to an inboard-outboard motor,

(c) anchor means projecting downward from the bottom side of the framework for releasable engagement with the inboard-outboard motor,

(d) an outboard motor mounting member on the rear side of the framework, and

(e) protective strip means secured to the front and bottom sides of the framework for interposition between said sides and the adjacent surfaces of the inboard-outboard motor.

3. An outboard motor attachment for an inboard-outboard motor provided with a hoisting eyelet at its upper side, the attachment comprising (a) a framework having front, rear and bottom sides,

(b) bracket means projecting forwardly from the front side of the framework for releasable attachment to an inboard-outboard motor, the bracket means comprising a pair of laterally spaced brackets adapted to receive the hoisting eyelet between them and having aligned openings therethrough registrable with said eyelet,

(c) securing pin means extending removably through said bracket openings and adapted to extend through said eyelet,

(d) anchor means projecting downward from the bottom side of the framework for releasable engagement with the inboard-outboard motor, and

(e) an outboard motor mounting member on the rear side of the framework.

4. An outboard motor mount attachment for an inboard-outboard motor provided with shock absorber pivot members projecting laterally from the opposite sides thereof, the attachment comprising (a) a framework having front, rear and bottom sides,

(b) bracket means projecting forwardly from thefront side of the framework for releasable attachment to an inboard-outboard motor,

(0) anchor means projecting downward from the bottom side of the framework for releasable engagement with the inboard-outboard motor and comprising a pair of hook members having lower ends offset angularly rearward for engaging under the shock absorber pivot members, and

(d) an outboard motor mounting member on the rear side of the framework.

5. The attachment of claim 4 wherein the inboard-outboard motor is provided with a hoisting eyelet at its upper side, and wherein (a) the bracket means comprises a pair of laterally spaced brackets adapted to receive the hoisting eyelet between them and having aligned openings therethrough registrable with said eyelet, and

(b) securing pin means extends removably through the said bracket openings and is adapted to extend through said eyelet.

References Cited UNITED STATES PATENTS 3,111,929 11/1963 Fisher -18 TRYGVE M. BLIX, Primary Examiner US. Cl. X.R. 2484 

